Fast food may be the reason for dump trucks to dive, city crows have higher cholesterol levels than their rural cousins.
This is the conclusion of a study published Tuesday by The Condor.
A research team at Hamilton College in New York investigates 140 California crows and finds that the more urban the bird, the higher it is her cholesterol.
The team then fed McDonald's cheeseburgers to crows in New York State and found that their cholesterol was higher than their winged counterparts, close to the one who had to take care of himself.
DAIRY BURGERS NO HUMAN MEAT, STORAGE CONSERVATION AFTER THE FEDERAL RESTAURANT OF THE WORLD is not clear if
Survival rates were lower for urban crows than for rural ones, but
"Despite all the bad press that is produced, cholesterol has benefits and performs many basic functions," says Andrea Townsend, who leads the research the team. "This is an important part of our cell membranes and a component of some crucial hormones." cholesterol causes disease in humans, but we do not know what the level would be "excessive" in a wild bird. "
Joko Yokimaki of the University of Lapland in Finland was surprised that fast food might not hurt crows, according to New Scientist.
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"There are probably some other factors related to cities that are more important to crows," such as diseases and car collisions, he said .